Milling-tool.



PATENTED MAY 19, 1908.

B. WON DERLY. MILLING TOOL.

APPLICATION FILED MAR. 16, 1907.

BARNARD WONDERLY, OF CANTON, OHIO.

' MILLING-TOOL.

Specification of Letters Patent.

Application filed March 16, 1907.

Patented May 19, 1908.

Serial No. 362,746.

To all whom it may concern:

Be it known that I, BARNARD WONDERLY, a citizen of the UnitedStates,residing at Canton, in the county of Stark and State of Ohio, 5have invented certain new and useful Improvements in Milling- Tools; andI do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawing,making a part of this specification, and to the numerals and figures ofreference marked thereon, in which- Figure 1 is a perspective view ofthe milling tool. Fig. 2 is a vertical sectionof the same. Fig. 3 is anend elevation. Fi 4 is a transverse. section on the line 44, Fig. 2.Figs. 5, 6 and 7, represent views of one of the cutters.

The resent invention has relation to milling too s, and it consists inthe novel arrange- .ment hereinafter described, and particularly pointedout in the claims.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawing. 2 5

In the accompanying drawing, 1 represents the shank, which is providedwith a hollow head 2, which head is screw threaded upon its outerperiphery, and is formed of suflic1ent size to provide sufficient roomto connect the various cutters, and to hold the same in fixedadjustment. The head 2 is provided with a series of longitudinal slots3, which slots are located at an angle to the axial line of the head andshank and are so located for the purpose hereinafter described. Thelongitudinal slots are 0 en at the end of the head, and serve to dividethe'latter into a series of segments.- Upon one face or wall of eachslot 3 is located the rotruding rib 4, which protruding rib may e formedseparate and connected or seated in a groove or which may be formed inteal with the'head. The rib 4 is formed of a ength to correspondsubstantially with the length of the slots. The ribs 4 are located at anangle to the'axial center of the head or in other words are inclinedtoward the axial center of the head as they approach the front end ofthe head and are so located for the purpose of causing the cutters 5 tomove in a path at an angle to the axial line of the head. 5

It will be understood that as the cutting ends of the cutters 5 are wornaway by use and by the proper sharpening of said cutters,

' the direction of rotation.

- the length of the cutters vary from time to time and in order tomaintain at all times and under allcireumstances the same distance ofthe cutters at their cutting points from their common center the ribs 4are inclined as above described.

It will be understood that in milling tools it is of importance that thesame diameter be maintained, so that the finished work will have apre-determined diameter.

It is well understood that in milling tools of this class the cuttersshould have a shear action upon the metal, and for this purpose thecutters are located at an angle to an axial line and by providing theangled slots 3 I am enabled to bring the cutters into such a positionthat their cutting ends will be at an angle to the shoulder upon whichthe cutting ends of the cutters come in contact during the time the headtogether with the cutters is rotated.

It will be understood that in the formation of bolts or any otherproduct where it is necessary to reduce the diameter of a certainportion of the stock, the stock is fed against the ends of the cuttersor the head may be given a forward movement if desired, the only objectbeing that there be a relative longitudinalmovement as between the stockand the cutters. In use the cutters are set to cut to a given diameter,which ma be an inch, half inch or any other size within the limits ofthe adjustment of the c'utters, which adjustment may be brought about bydifferent width of cutters, and each cutterof a given set or sizeproperly. connected to the head.

It will be understood that the cutters must be held against any relativemovement as between the head 2, and the cutters 5, and in order to holdthe cutters against any endwise movement the collar 6 is provided, whichcollar is rovided with the inward extending lugs 7, w ich operate in thel'ongitudinalslots 3, and the rear ends of the cutters 5 abutted againstthe lugs 7. For the purpose of holding the collar in fixed adjustment,together which ring is screw threaded upon its inner periphery, and whenlocated upon the head 2 and rotated it will move upon the head inopposite directions, reference being had to After the ring 8 'with thecutters 5, the ring 8 is provided,

has been brought into proper adjustment it I flanges 10. For the isclamped by means of the clam ing bolt 9-,

which clamping bolt passes t ough .the urpose of providing for theclamping of t e ring 8 it must of course be cut so as to allow the flanes 10 to be brought toward each other, an the di- 'ameter of the ringreduced.

It will be understood that the cutters must be held in a 'fixed positionwith refer-' ing bolt 13 asses. The clamping ring 11 is screw threa edupon its inner periphery, so that it may be ad usted to an desired pointupon the head 2. In Fig. 3 I ave shown set screws 14, which set screwsare for the purpose of providing means for clamping the cutters inaddition to the clam ing act1on of the ring 11, but I do not desire tobe confinedto the set screws 14, owing to the fact that in mostinstancesthe clampin rin 11, will sufliciently bind the cutters so t att ere will be no relative movement as between the It will be understoodthat by settin the cutters at an incline to the axes of the ead that thedistance between the inner edges of cutters, and the head.

, 'the cutters will increase in distance from their cutting ends towardtheir rear ends,

' thereby providin suflicient clearance for all purposes and hoI ing thecutters out of contact with the stock, except at the point where theyare brought into action or cutting points. It will also be understoodthat by inclining the slots or cutting the slots at right angles totheinclination of the cutters a shear cut is produced, or in other words byproviding the compound angle of the cutters with reference to the axialline of the cute ter head, I provide for the proper clearance, and. ashear cut.

When it is desired to insert cutters of less thickness than the width ofthe slots 3, the

liners 15 are employed, so as to properly hold the-cutters 5, regardlessof their width, which outters must be provided with the grooves.16,'which grooves receive the ribs 4, and for the.pur ose ofcausing thecutters to follow the mo ination of the ribsthe grooves are formedarallel with the cutters. By 1nclining t e slots 3 as above describedand locating the cutters therein, said cutters will be located spirallyto an axial line of the head,

and by inclining the ribs ,4 and protruding the bolt 13, is tightenedandring 11, com- J presses the segments and binds the cutters securely inthe slots, and when the bolt 9, is tightened the cutters are heldagainst longitudinal displacement.

- For the purpose of holding the liners 15 in proper position after theyhave been set, they are provided with the flanges 17, which flanges areconnected to the head 2 by means of the screws 18, or their equivalents.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is-

1. In a milling tool, the combination of a head, a series of slotsformedin the head, one wall of each slot provided with a protruding rib,cutters provlded with grooves formed parallel withthe cutters and theribs inclined i outwardly from the axial line of the cutter,

and adapted to be seated in the grooves, an

abutting collar provided with lugs and the.

lugs located in the slots, a clamping ring adapted to hold the collar infixed adjustment and in contact with the rear end of the cutter, andmeans for binding the cutters to the head, substantially as and'for thepurposes specified.

2. In a milling tool, the combination of a I head formed with slots atan angle to the.

axial line of the head, cutters located in theslots below the peripheryof the head, grooves and ribs formed between the walls of the slots andthe cutters, said ribs being inclined in a plane at ri ht angles'to theplane'of the inclination of t e-slots, and a clam ing ring on the headto. compress the head an thereby hold the cutters.

- 3. In a milling tool, the combination of a head formed with a seriesof longitudinal slots, cutters located in the slots, an abutting collarprovided with lugs which operate in the slots, means for holding thecollar in fixed adjusted position, and means for clamp ing the cuttersinthe head.

4. Inla milling tool, the combination with a hollow head formed withhorizontal slots through the walls thereofand open at the, ends, cuttersfitting in the slots and exten'd ing inwardl beyond the walls thereof,and

means for orcing the segments formed by the slots inward to clam thecutters.-

5. In a milling tool, t e combination with a hollow externally threadedhead formed with slots adapted to receive cutters, an internallythreaded contractible element engaging the threaded head, and means forcon-.

tracting the internally threaded element to com ress the segments of thehead formed.

by t e slots.

6. a hollow externally threaded head formed with longitudinal1slotsdadapted to receilve cutters, a spit t reade ring engaging t ethreaded head, andmeans for clamping the s lit threaded ring to.compress the segments 0? the head formed by the slots.

In a milling tool, the combination 7. In amilling tool, the combinationwith In testimony that I claim the above, I a hollow head having openended slots, of an have hereunto subscribed my name in the abutmentmounted on the head and having presence of two Witnesses. adjustablethreaded connection with said BARN ARD WONDERLY. 5 head, a splitthreaded ring engaging the Witnesses:

threaded head, and means for clamping the JOHN H. SPONSELLS, ring. F. W.BOND.

